Zheng, J., Zhang, Y., Yu, H., Wang, J., Guo, H., Qiu, Y., Wang, X., Feng, Y., Liu, L. and Li, W. J. (2025) “Tunable Optical Metamaterial Enables Steganography, Rewriting, and Multilevel Information Storage”, Nano-Micro Letters, 18, p. 58. doi: 10.1007/s40820-025-01897-9.